I'll be your best kept secret and your best mistake

This book is about a famous celebrity that's in a band named fall out boy. He is the lead singer of the band. When Patrick is singing at a concert he looks through the crowd and sees this beautiful blonde haired blue eyed girl. After the concert he tries to find her. They end up getting together but are forced to keep their love for one another a secret. Once the public "approves" of their relationship Patrick and his girlfriend are on a plane together headed to Patrick's next concert and they get in this huge crash and are stranded on an island. While on an island an accident happened that is life threatening. Will that character survive and tell the story or will they die leaving their family to grieve over the loss of their loved one?